Implement device.getSupportedDevices()

lib/device/device.coffee

@@ -6,3 +6,6 @@ exports.getDisplayName = (device) ->
 		if _.indexOf(value, device) isnt -1
 			return key
 	return 'Unknown'
+
+exports.getSupportedDevices = ->
+	return _.keys(DEVICE_NAMES)

lib/device/device.spec.coffee

@@ -25,3 +25,9 @@ describe 'Device:', ->
 
 			for name in unknownNames
 				expect(device.getDisplayName(name)).to.equal('Unknown')
+
+	describe '#getSupportedDevices()', ->
+
+		it 'should return an array', ->
+			result = device.getSupportedDevices()
+			expect(result).to.be.an.instanceof(Array)